UPDATE: Microsoft 365 Email Outage Continues Into November 13 — Recovery Efforts Underway
Service Alert Update — Friday, November 13, 2026, 3:20 AM EST
Current Status: Service Disruption — Recovery in Progress
Network Solutions and Optimization (NSAO) continues monitoring the widespread Microsoft 365 service disruption that began Thursday, November 12, and has continued overnight into Friday, November 13.
Microsoft has reported progress in stabilizing its infrastructure, but services have not yet been fully restored. Some users may regain access while others continue experiencing connectivity issues.
Latest Update From Microsoft
According to Microsoft's latest service health information, engineers have deployed a corrective patch targeting an authentication and routing component within its affected infrastructure.
Microsoft reports that the patch has improved server stability and is now being deployed more broadly, with priority given to regions approaching peak business hours.
However, Microsoft is continuing to investigate and implement additional improvements. A confirmed time for full restoration has not been announced.
Microsoft incident references:
EX1550543 — Exchange Online mailbox connectivity
MO1550821 — Multiple Microsoft 365 services affected
Microsoft has also indicated that it is not currently aware of malicious activity responsible for this incident.
What Services Are Affected?
Depending on the user and Microsoft 365 environment, the following issues may occur:
Outlook and Exchange Online: Difficulty connecting to email, accessing mailboxes, or sending and receiving messages. Email delivery may be delayed.
Microsoft 365 Admin Center: Some administrative pages may fail to load.
Microsoft Teams: Calendar features, meeting scheduling, and certain functions that depend on Exchange Online may be unavailable.
Microsoft 365 Copilot: Some AI features may be unavailable or unable to access Microsoft 365 work data.
SharePoint and other Microsoft 365 services: Certain functions, particularly those that depend on email or Exchange Online, may be affected.
Not every Microsoft 365 service or feature is unavailable. The impact varies depending on the service and infrastructure involved.
What Should NSAO Customers Do?
If your business is still experiencing Microsoft 365 email problems, we recommend the following:
Avoid making unnecessary changes. Do not delete Outlook profiles, reinstall Office, or reset passwords solely because email is unavailable.
Use alternate communication methods. Telephone calls and other independently available communication tools are recommended for urgent matters.
Be cautious with email delivery. Messages may be delayed, and a sender may not immediately know that the recipient is experiencing problems.
Allow Microsoft to complete recovery efforts. Services may recover gradually rather than simultaneously for every customer.
Monitor official updates. NSAO will continue monitoring Microsoft's announcements and updating our customers as new information becomes available.
Where to Check Microsoft's Official Service Status
Microsoft 365 Service Health Dashboard (administrator login required):
Microsoft's public service status page:
Microsoft 365 Status on X:
How to Contact NSAO for Support
Because this incident may also affect NSAO’s ability to receive and respond to email, please do not rely exclusively on email for urgent technical support requests.
Our preferred first method of contact is to text us at (330) 966-8097.This gives us a more immediate ability to handle and communicate with you directly as you need anything.
If needed, you may also call (330) 966-8097 and leave a voicemail with your name, company, issue, and callback number.
For additional details and ongoing updates, please visit our blog: https://www.nsao.com/blog
Thank you for your understanding.
Network Solutions and Optimization, LLC (NSAO)
Managed IT, Security and Cloud
Last updated: November 13, 2026, 3:20 AM EST
This article reflects Microsoft's published service health information at the time of the update. Recovery conditions may change as Microsoft continues its restoration work.
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